Question

create and describe a specific crime scene and develop a detailed protocol for how you, as the forensic crime scene analyst, would go about analyzing blood spatter at the crime scene. What measurements would you make? What can you learn from the shapes of blood drops? How would you use those measurements to determine what happened at the crime scene, e.g. how would you determine the type of weapon used, the height of the attacker, the movement of the attacker or victim, etc.

Answer 1

the crime scene is a place where the actual crime has occured. in a crime scene everything objects even the tiny spec are important. you have to search for the biological evidences, trace eveidences etc. the type of biological evidence depends on the nature of crime. they can be blood, skin cells under the nails, semen, finger prints, saliva,, anything that can give the DNA.

Blood spatter analysis or examination will define how this blood has been shed in a crime scene. this is done to draw conclusions about the nature of the crime, the type of weapon used and the position of the criminal and the victim

when the blood is shed from the victim and it touches a surface it causes different shapes on these surfaces where the blood is shed. it depends on the velocity of the spatter, angle of impact, distance travelled etc. the shape of the spatter will also differ it can be roun or eliptical according to the velocity and the distane travelled .

blood stain pattern is examined by looking on to the shape and size of the droplets and appearance of the field of spatter. recnstruction of the scene will be done later after the examination of the blood to determine wheher it has come from the victim of r the suspect,after this look for the convergence pattern. estimated by calculating the angle of spatter through longitudinal lines. and compare it with the location of the victim to identify the angle and distance of spatter from the victim.